<template>
  <div class="login_container">
    <!-- 大标题 -->
    <div class="login_title">
      <h1>后台管理系统</h1>
    </div>
    <!-- 粒子 -->
    <vue-particles
      color="#fff"
      :particleOpacity="1"
      :particlesNumber="80"
      shapeType="circle"
      :particleSize="2"
      linesColor="#fff"
      :linesWidth="1"
      :lineLinked="true"
      :lineOpacity="0.8"
      :linesDistance="150"
      :moveSpeed="3"
      :hoverEffect="true"
      hoverMode="grab"
      :clickEffect="true"
      clickMode="remove"
    ></vue-particles>

    <div class="login_box">
      <!-- 头像区域 -->
      <!-- <div class="avatar_box">
        <img src="../assets/img/logo.png" alt="" />
      </div> -->
      <!-- 登录表单区域 -->
      <div class="login_text">
        <h3>帐号密码登录</h3>
      </div>
      <el-form
        ref="loginFormRef"
        :model="loginForm"
        :rules="loginFormRules"
        label-width="0px"
        class="login_form"
      >
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input
            v-model="loginForm.username"
            prefix-icon="iconfont icon-user"
          ></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input
            v-model="loginForm.password"
            prefix-icon="iconfont icon-3702mima"
            type="password"
          ></el-input>
        </el-form-item>
        <!-- 按钮区域 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 这是登录表单的数据绑定对象
      loginForm: {
        username: 'admin',
        password: '123456',
      },
      // 这是表单的验证规则对象
      loginFormRules: {
        // 验证用户名是否合法
        username: [
          { required: true, message: '请输入登录名称', trigger: 'blur' },
          {
            min: 3,
            max: 10,
            message: '长度在 3 到 10 个字符',
            trigger: 'blur',
          },
        ],
        // 验证密码是否合法
        password: [
          { required: true, message: '请输入登录密码', trigger: 'blur' },
          {
            min: 6,
            max: 15,
            message: '长度在 6 到 15 个字符',
            trigger: 'blur',
          },
        ],
      },
    }
  },
  methods: {
    // 点击重置按钮，重置登录表单
    resetLoginForm() {
      // console.log(this);
      this.$refs.loginFormRef.resetFields()
    },
    login() {
      this.$refs.loginFormRef.validate(async (valid) => {
        if (!valid) return
        const { data: res } = await this.$http.post('login', this.loginForm)
        if (res.meta.status !== 200) return this.$message.error('登录失败！')
        this.$message.success('登录成功')
        // 1. 将登录成功之后的 token，保存到客户端的 sessionStorage 中
        //   1.1 项目中出了登录之外的其他API接口，必须在登录之后才能访问
        //   1.2 token 只应在当前网站打开期间生效，所以将 token 保存在 sessionStorage 中
        window.sessionStorage.setItem('token', res.data.token)
        // 2. 通过编程式导航跳转到后台主页，路由地址是 /home
        this.$router.push({path:'/home',query:{userid:this.loginForm.username}})
      })
    },
  },
}
</script>

<style  scoped>
.login_container {
  background-color: #000;
  height: 100%;
  overflow: hidden;
}

.login_box {
  width: 450px;
  height: 266px;
  background-color: rgba(255, 255, 255, 0.6);
  border-radius: 10px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}
/* .login_box .avatar_box {
  height: 130px;
  width: 130px;
  border: 1px solid #eee;
  border-radius: 50%;
  padding: 10px;
  box-shadow: 0 0 10px #ddd;
  position: absolute;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: #fff;
} */
/* .login_box .avatar_box img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background-color: #eee;
} */
.login_title {
  color: #fff;
  position: absolute;
  left: 50%;
  top: 15%;
  transform: translate(-50%);
  /* font-family:"Playfair Display SC" */
  /* transform: translate(-50%, -50%); */
  /* text-align: center; */
  /* z-index: 99999; */
  /* left: 999px; */
  /* height: 20px; */
}

.login_text {
  color: #000;
  text-align: center;
  /* width: 100%; */
  /* height: 50px; */
  /* background-color: #000; */
}

.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}

.btns {
  display: flex;
  justify-content: flex-end;
}
</style>
